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  • Title: Effect of angiotensin II and of an angiotensin II analogue (Sar1-Ile8-angiotensin II) on blood pressure, plasma aldosterone and plasma renin activity in the dog.
    Author: Beckerhoff R, Uhlschmid G, Vetter W, Armbruster H, Nussberger J, Reck G, Schmied U, Siegenthaler W.
    Journal: Clin Sci Mol Med Suppl; 1975 Jun; 2():41s-44s. PubMed ID: 1077788.
    Abstract:
    1. The effect of infusions of equimolar doses of angiotensin II (AII) and of the angiotensin analogue Sar1-Ile8-angiotensin II on arterial blood pressure, plasma aldosterone and plasma renin activity were compared in normal anaesthetized dexamethasone suppressed dogs. 2. Angiotensin II induced a significant increase of blood pressure and of plasma aldosterone whereas plasma renin activity decreased. The blood pressure was only slightly affected by large doses of the analogue. Plasma aldosterone, however, increased and plasma renin activity decreased. These changes were significant but less pronounced than after the infusions of angiotensin II. Plasma aldosterone remained high and renin activity low for 40 min after the infusions of the analogue. 3. The results suggest a strong agonistic potency of Sar1-Ile8-angiotensin II at the adrenal and renal angiotensin receptors, and that it is almost ineffective at the vascular receptors. The inhibition of renin secretion by angiotensin seems not be related to its vasoconstrictive activity.
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